Warp bubble only take about 15 bill if I'm not mistaken, and besides that, you can just invest in cloaking??
You are mistaken... lol... lvl 1 takes 18.75Bi / 40CP. Never bothered to do it myself but considering the same logic applies to that of all research, getting lvl 5 or 6 wrap will take you 200-300Bil and loads of CP...
About cloaking, last round Spanky had lvl25+ scanner. Surely no new or lower FP commander can top that..
I am just highlighting the flaw in this rule... I am not even bothered by it.